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Open Access Highly Accessed Research article

Interpreting cerebrospinal fluid pleocytosis in HIV in the era of potent antiretroviral therapy

Christina M Marra1*, Clare L Maxwell2, Ann C Collier1, Kevin R Robertson3 and Allison Imrie4

Author Affiliations

1 Harborview Medical Center, University of Washington, Seattle, WA, USA

2 Department of Neurology, University of Washington, Seattle, WA, USA

3 Department of Neurology, University of North Carolina School of Medicine, Chapel Hill, NC, USA

4 Department of Public Health Sciences, University of Hawaii at Manoa John A. Burns School of Medicine, Honolulu, HI, USA

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BMC Infectious Diseases 2007, 7:37  doi:10.1186/1471-2334-7-37

Published: 2 May 2007

Abstract

Background

Cerebrospinal fluid (CSF) pleocytosis may be seen in asymptomatic HIV-infected individuals. This finding complicates interpretation of CSF abnormalities when such individuals are evaluated for other central nervous system infections. The goal of this study was to determine the relationship between CSF pleocytosis, central nervous system (CNS) antiretroviral penetration, adherence to antiretroviral medication regimens, neurological symptoms and performance on neuropsychological tests.

Methods

Clinically stable HIV-infected individuals at any peripheral blood CD4+ T cell count or any plasma viral load were asked to attend study visits at entry and every 6 months thereafter for at least one year. At each visit, they underwent a standardized neurological and medication history; neurological examination; a brief neuropsychological test battery: venipuncture; lumbar puncture; and assessment of medication adherence. Generalized estimating equations (GEE) were used to assess the relationships between CSF pleocytosis and other variables.

Results

CSF pleocytosis was independently and significantly related to lack of current antiretroviral use (OR 5.9, 95% CI 1.8–18.6, p = 0.003), CD4 count > 200/ul (OR 23.4, 95% CI 3.1–177.3, p = 0.002) and detectable plasma HIV RNA (OR 3.3, 95% CI 1.1–9.4, p = 0.03). At visits where antiretrovirals were used, and taking into account detectable plasma HIV RNA, an antiretroviral regimen that contained two or more agents with good CNS penetration conferred a trend toward lower odds of CSF pleocytosis (OR 0.45, 95% CI 0.18–1.12, p = 0.087).

Conclusion

CSF pleocytosis is a characteristic of HIV disease that varies significantly with easily identifiable clinical and laboratory features. Use of antiretroviral agents decreases the odds of pleocytosis. This association may be stronger when the regimen contains two or more agents with good CNS penetration.